Human ingenuity truly knows no bounds, and this news item certainly shows that.
It's a metal puzzle cube, 125 pieces in all if you can believe it, that when specific pieces from the cube are assembled properly forms a fully-functional .45 caliber single-shot pistol.
And to make all the nanny-staters happy, it comes with its own lock, so you can't take the cube apart "without authorization".
From the article...
Just in case solving a puzzle wasn’t good enough protection from hiding your new handgun, there’s also a special key that you need to use to “unlock” the original cube, before anyone can start taking apart the pieces. So, you can have this block sitting around your home, looking like a nice decorative piece, but all the while you’ll know it’s hiding a very deadly, yet awesome secret.
Not that anyone will be recommending it for home defense, mind you. Something a little more accessible would be preferred if some violent offender decides to invade your home. :)